I will say, the baptism thing does sound like manipulation to me.
Maybe because it's not that far off of what XABF tried to do to me towards the end.
He decided he wanted to start going to church, and that I could pick which one we'd go to, and that he'd even go to a Roman Catholic one if that's what I wanted.
I was raised Roman Catholic, but I've only ever heard him make cruel remarks about the Pope and Roman Catholics, and the fact he would say he wanted to go to one of their churches for Mass just reeked of manipulation to me.
This may not be true in your husband's case, of course - I don't know.
I do know that you should do what makes YOU feel happy, and if you don't want to go, then don't.